In the past Rio City was a good GF choice. However things have changed.
Our waiter was rushed and never even offered to get drinks. We had a question on an item marked GF "friendly" for the chef. Our waiter told us he wasn't going to ask because the "chef wouldn't know." The waiter was clearly annoyed and then just walked away to help another table. That was really poor form for a guy who never even offered a drink... It felt rushed and the waiter made us feel like we were taking up his valuable time.
The food was good, although overshadowed by the service. We are hoping that all ends well, but the risk will likely steer us away.

UPDATE: NO LONGER OFFERING GLUTEN-FREE FOOD. Only "gluten-sensitive".
PREVIOUS REVIEW: I had the salmon and it was perfectly cooked. My non-celiac's Caesar salad looked very fresh, and the gluten-free dessert called something like "coffee and donuts" was absolutely yummy (and we did not mind that it was a tiny portion because it was such a high quality dessert). The espresso I had here is the best I have found so far in this area. I wish they were open before 10am because I'd like to have my morning coffee here!